Tile sewer.



G. H. TEFFT.

TILE SEWER.

APPLICATION FILED JAN. 20, 1915.

Patented M328, 1916.

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GEORGE H.- rnrrir, or KANSAS CITY, MISSOURI.

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Patented Mar. 28, 1916.

Application filed January 20, 1915. Serial No. 3,238.

To all whom it may concern:

Be it known that I, .Gnoncn TEFFT, a citizen of the United States, residing at Kansas City, in the county of Jackson and stator Missouri, have invented certain new and useful Improvements in Tile Sewers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the Same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to a tile sewer, and has for its principal object the construction of a sewermore particularly an egg-shaped sewer-of hollow tile.

It is a further object of the invention to not only provide a hollow tile sewer, but to provide a structure of this character in which the individual tile are locked together when assembled, so that pressure from either the interior or exterior will not tend to break the joints or separate the tile. In accomplishing this object, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Figure I is a perspective view of a hollow tile Sewer constructed in accordance with my invention. Fig. II is a detail perspective of one of the keying base tiles. Fig. III is a similar view of the opposite keying base tile.

Referring more in detail to the parts: 1 designates the sewer as a body, which is made up of individual hollow tile members, most of which are of specific and particular construction, in order that they may be assembled in a unit to form a locking combination of the character described. The principal units in the structure are the locking base members 2-3, each of which comprises a flat bottom 4 that rests on the bottom of the sewer trench, and an upper face 5, which faces. Each of the base blocks is also provided with an outwardly facing and downset shoulder 9 that faces an outer Supporting base 10 upon which one of the shell tiles 11 is adapted to seat; the face "10 of the base tile being inclined upwardly and outwardly from the shoulder 9 and the bottom edge of the tile 11 being inclined downwardly and inwardly to seat at an angle on the base tile, so that the inner corner of the tile 11 is wedged against the Shoulder 9 by the weight of the parts supported on the said tile 11; the shoulder 9 being preferably backset to form a dove-tail socket for receiving the point of the shell tile.

Supported on the upper edge of the tile 11 is a side tile 12 having its longitudinal edges beveled to seat flush against the longitudinal edges of under and upper tiles and carry out a keystone alinement of the structure as a whole, and having lips 13 on their inner edges for seating in the dove-tail sockets in the base members, and mounted on the upper edges of the Side tiles are arch members 14:, which preferably carry a keystone tile 15 that forms the top and locking member of the structure.

It is apparent that with this arrangement, the tiles may be set on the bottom of a sewer trench and the Side and arch tiles assembled thereon, so that when the structure is completed, the weight of the tiles themselves will have a line of strain that will carry the pressure to the shoulders on the base tiles 23, and that pressure either from the interior or exterior of the sewer will also be transferred to the locking seat, so that it will be impossible for the tile to separate.

With this construction the shell tiles will assume their proper alinement when placed in position, and will maintain such alinement without outside support, while the mortar joints are setting and the earth is filled in the trench, owing to the key and keystone combination of the several tile.

While I have shown and described my invention as comprising a base made up of two individual tile and the body as comprising a definite number, I do not wish to limit myself to Such definite construction, as the number of tile in any definite portion of the sewer is not material to the invention. It is also apparent that the interior of the sewer may be finished in any desired or suitable manner, and that the vertical section may be modified to meet conditions or requirements.

Having thus described my invention, what I claim as new therein, and desire to secure by LettersPatent, 1s:

In a sewer, the combination with base forming a socket for receiving the rail on the cooperating member, to key the members 10 together, the outer edges of the-base members having inwardly and downwardly iIlclined supporting faces and relativelyvertical stop shoulders, and casing-members having inclined lower edges and relatively vertical, inner stop faces bearingrespectively on the supporting faces and stop shoulders of the base members.

In testimony whereof I afiix my signature in presence of two witnesses.

" GEORGE H. TEFFT,

Copies of this patent may be obtained for five cents each, by addressing the vcomxnissionerlof Patents, 7 Washington, D. G. V g V V 

